Security Engineering Senior Engineer

Employment TypePermanent

Closing Date12 Feb 2026 11:59pm

Job TitleSecurity Engineering Senior Engineer

Job Summary

As a Security Engineering – Senior Engineer, you are an expert in the Information, Engineering and Cyber Security domains, applying your extensive knowledge in security technologies, cloud and corporate networks to shape the security controls required within solution designs (both people, process and technical) and identify, communicate and help treat corresponding security risks.
Through your strong knowledge of existing and emerging technology, you are able deliver a superior security and network experience for our consumers. You do this by drawing on your deep levels of cyber security and engineering knowledge and experience to provide specialist analysis, design, development and deployment in Network and IT specific technology domains.
You play a pivotal role in shaping our technology strategy and protecting Telstra’s assets, acting as a trusted adviser to our people, teams, cyber, engineering and DevOps leaders to build our cyber capability.Job DescriptionWho We AreWe're an iconic Aussie brand with a global footprint. Our purpose is to build a connected future so everyone can thrive. We're all about providing the best experience and delivering the best tech on the best network.This includes making Telstra the place you want to work. For you, that means a having career that grows with you and working with a team powered by human connection that prioritises wellbeing and choice.
Focus of the RoleThe purpose of this role within the Network and Infrastructure Security team is to provide specialist design, development and deployment of security platforms and solutions for Telstra. This includes developing technology roadmaps that aligns with Security strategy to deliver capability solutions that increase Telstra’s overall Cyber Security posture
What We OfferPerformance-related pay
Access to thousands of learning programs so you can level-up
Global presence across 22 countries; opportunities to work where we do business.Purchased annual leave schemeAdditional Telstra day offAdditional 30% off Telstra products and servicesToolkit provided (laptop + mobile phone + plan paid for)What You’ll Do

• Provide expertise: Serve as the SME and design authority for end‑to‑end systems and processes throughout their lifecycle.
• Align with strategy: Ensure solutions align with product and technology roadmaps and leverage emerging technologies.
• Design solutions: Translate complex architectures and business requirements into actionable platform‑specific designs.
• Implement solutions: Deliver high‑quality end‑to‑end systems, integrating multiple technologies and resolving component‑level issues.
• Manage stakeholders: Set expectations, drive change, and negotiate effectively across diverse business environments.
• Manage vendors: Oversee vendor performance and delivery with support from vendor management teams.
• Handle risks: Identify risks and issues, recommend mitigations, and manage contingency plans to closure.
• Lifecycle management: Plan for system capacity, performance, and availability; manage budgets and drive cost reduction through simplification and new technology.
• Knowledge management: Stay updated on emerging technologies and contribute to organizational knowledge and process improvement.
• Compliance: Follow all relevant standards and processes, ensuring deliverables meet quality benchmarks.
• Operational support: Work on incident and problem tickets, identify root causes, implement permanent fixes, and participate in on‑call rotations.

About You

• Experience with Netskope, ZTNA, Illumio, Micro‑Segmentation, Firewalling, Routing, Switching, IPS/IDS.
• Strong understanding of Cisco FTD, Firewalls, VPN, Proxy Gateways.
• Knowledge of security protocols: IP, TCP, UDP, IPsec, SSL, HTTP/S, FTP, SSH.
• Familiar with BGP (multiple VRs/VRFs), VLANs, MPLS, VPLS.
• Expertise in SDN / NFV concepts.
• Understanding of Cloud Security across Azure, GCP, and AWS.
• Proficient in Virtualisation (VMware) and Cloud (AWS, GCP, Azure) solutions.
• Knowledge of VMware product portfolio: vCloud, vSphere, vCenter, vRealize Operations, Horizon View, VSAN, NSX.
• Experience with datacentre standards, design, integration, and troubleshooting.
• Skilled in data centre planning, monitoring/alarming, and backup processes.

• Proven ability to author:
• Platform Documentation
• Business Requirement Definitions
• Solution Architecture Documentation
• Requirements Documentation
• Support Documentation (Level 1, 2, 3)
• Strong experience in preparing technical standards and architectural deliverables.
• Operational Processes & Governance
• Knowledge of Telstra change management processes.
• Familiarity with the ORC process.
• Understanding of security operations principles: incident management, problem management, on‑call support.

We're amongst the top 2% of companies globally in the CDP Global Climate Change Index 2023, being awarded an 'A' rating. If you want to work for a company that cares about sustainability, we want to hear from you.
As part of your application with Telstra, you may receive communications from us on +61 440 135 548 (for job applications in Australia) and +1 (623) 400-7726 (for job applications in the Philippines and India).
When you join our team, you become part of a welcoming and inclusive community where everyone is respected, valued and celebrated. We actively seek individuals from various backgrounds, ethnicities, genders and disabilities because we know that diversity not only strengthens our team but also enriches our work. We have zero tolerance for harassment of any kind, and we prioritise creating a workplace culture where everyone is safe and can thrive. 
As part of the hiring process, all identified candidates will undergo a background check, and the results will play a role in the final decision regarding your application.
We work flexibly at Telstra. Talk to us about what flexibility means to you. When you apply, you can share your pronouns and / or any reasonable adjustments needed to take part equitably during the recruitment process.
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